Alliteration is a stylistic literary device identified by the repeated sound of the first consonant in a series of multiple words, or the repetition of the same sounds or of the same kinds of sounds at the beginning of words or in stressed syllables of a phrase. "Alliteration" comes from the Latin word “litera”, meaning “letters of the alphabet”, and the first known use of the word as a literary device occurred around 1624. Alliteration developed largely through poetry, in which it more narrowly refers to the repetition of a consonant in any syllables that, according to the poem's meter, are stressed, as in James Thomson's verse "Come…dragging the lazy languid Line along". Another example is, "Peter Piper Picked a Peck of Pickled Peppers".Consonance (ex: As the wind will bend) is another 'phonetic agreement' akin to alliteration. It refers to the repetition of consonant sounds. Alliteration is a special case of consonance where the repeated consonant sound is at the stressed syllable. Alliteration may also include the use of different consonants with similar properties such as alliterating z with s, as does the author of Sir Gawain and the Green Knight, or as Anglo-Saxon (Old English) poets would alliterate hard/fricative g with soft g (the latter exemplified in some courses as the letter yogh - ȝ - pronounced like the y in yarrow or the j in Jotunheim); this is known as license.[citation needed]There is one specialised form of alliteration called Symmetrical Alliteration. That is, alliteration containing parallelism. In this case, the phrase must be constituted of two end words both starting with the same letter, and the pairs of outside words getting progressively closer to the centre of the phrase also starting with identical letters. For example, "rust brown blazers rule", "purely and fundamentally for analytical purposes" or "fluoro colour co-ordination forever". Symmetrical alliteration is similar to palindromes in its usage of symmetry.